CISSP-ISSAP · Question #138
Which of the following authentication methods is based on physical appearance of a user?
The correct answer is B. Biometrics. Biometrics is correct because it authenticates users based on unique physical characteristics - fingerprints, iris patterns, facial recognition, or voice - all derived from the user's physical appearance or biological traits. A key fob (A) is a physical token that generates time-
Question
Which of the following authentication methods is based on physical appearance of a user?
Options
- AKey fob
- BBiometrics
- CID/password combination
- DSmart card
How the community answered
(50 responses)- A2% (1)
- B92% (46)
- C2% (1)
- D4% (2)
Explanation
Biometrics is correct because it authenticates users based on unique physical characteristics - fingerprints, iris patterns, facial recognition, or voice - all derived from the user's physical appearance or biological traits.
A key fob (A) is a physical token that generates time-based codes; it's something you have, not something you are. An ID/password combination (C) is something you know - credentials stored in memory, not tied to your body. A smart card (D) is also something you have - a chip-embedded card requiring possession, not physical identity.
Memory tip: Think of the word root - bio (life) + metrics (measurement). Biometrics literally measures living physical traits, making it the only option tied to the body itself. The other three all require carrying or remembering something external.
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